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  Subjects -> CHEMISTRY (Total: 849 journals)
    - ANALYTICAL CHEMISTRY (47 journals)
    - CHEMISTRY (603 journals)
    - CRYSTALLOGRAPHY (22 journals)
    - ELECTROCHEMISTRY (26 journals)
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    - PHYSICAL CHEMISTRY (65 journals)

ANALYTICAL CHEMISTRY (47 journals)

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Accounts of Chemical Research     Full-text available via subscription   (Followers: 96)
Acta Analytica     Hybrid Journal   (Followers: 7)
Advances in Analytical Chemistry     Open Access   (Followers: 27)
American Journal of Analytical Chemistry     Open Access   (Followers: 31)
Analytica Chimica Acta     Hybrid Journal   (Followers: 38)
Analytical and Bioanalytical Chemistry     Hybrid Journal   (Followers: 31)
Analytical Chemistry     Full-text available via subscription   (Followers: 230)
Analytical Chemistry Insights     Open Access   (Followers: 22)
Analytical Chemistry Research     Open Access   (Followers: 7)
Analytical Letters     Hybrid Journal   (Followers: 11)
Analytical Spectroscopy Library     Full-text available via subscription   (Followers: 9)
Annual Review of Analytical Chemistry     Full-text available via subscription   (Followers: 9)
Biomonitoring     Open Access   (Followers: 2)
Chinese Journal of Analytical Chemistry     Full-text available via subscription   (Followers: 3)
Combinatorial Chemistry - an Online Journal     Open Access   (Followers: 2)
Comprehensive Analytical Chemistry     Full-text available via subscription   (Followers: 5)
Critical Reviews in Analytical Chemistry     Hybrid Journal   (Followers: 25)
Current Analytical Chemistry     Hybrid Journal   (Followers: 7)
Drug Testing and Analysis     Hybrid Journal   (Followers: 6)
Electroanalysis     Hybrid Journal   (Followers: 5)
Field Analytical Chemistry and Technology     Hybrid Journal   (Followers: 4)
Handbook of Analytical Separations     Full-text available via subscription   (Followers: 1)
Handbook of Thermal Analysis and Calorimetry     Full-text available via subscription  
International Journal of Analytical Chemistry     Open Access   (Followers: 21)
International Journal of Chemical and Analytical Science     Full-text available via subscription   (Followers: 3)
International Journal of Environmental Analytical Chemistry     Hybrid Journal   (Followers: 6)
International Journal of Polymer Analysis and Characterization     Hybrid Journal   (Followers: 6)
Journal of Analytical & Bioanalytical Techniques     Open Access   (Followers: 6)
Journal of Analytical Atomic Spectrometry     Full-text available via subscription   (Followers: 10)
Journal of Analytical Chemistry     Hybrid Journal   (Followers: 19)
Journal of Electroanalytical Chemistry     Hybrid Journal   (Followers: 4)
Journal of Essential Oil Research     Hybrid Journal   (Followers: 2)
Journal of Radioanalytical and Nuclear Chemistry     Hybrid Journal   (Followers: 5)
Journal of Thermal Analysis and Calorimetry     Hybrid Journal   (Followers: 22)
Main Group Metal Chemistry     Hybrid Journal   (Followers: 1)
Microchemical Journal     Hybrid Journal   (Followers: 3)
Nigerian Journal of Chemical Research     Full-text available via subscription  
Phytochemical Analysis     Hybrid Journal   (Followers: 2)
Polish Journal of Chemical Technology     Open Access   (Followers: 1)
Reviews in Analytical Chemistry     Hybrid Journal   (Followers: 9)
Sample Preparation     Open Access  
Surface and Interface Analysis     Hybrid Journal   (Followers: 13)
Techniques and Instrumentation in Analytical Chemistry     Full-text available via subscription   (Followers: 5)
TrAC Trends in Analytical Chemistry     Full-text available via subscription   (Followers: 54)
Trends in Environmental Analytical Chemistry     Hybrid Journal   (Followers: 2)
Vibrational Spectroscopy     Hybrid Journal   (Followers: 11)
World Journal of Analytical Chemistry     Open Access   (Followers: 1)
Journal Cover Journal of Analytical Chemistry
  [SJR: 0.268]   [H-I: 23]   [19 followers]  Follow
    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
   ISSN (Print) 1608-3199 - ISSN (Online) 1061-9348
   Published by Springer-Verlag Homepage  [2336 journals]
  • Laser sampling in inductively coupled plasma mass spectrometry in the
           inorganic analysis of solid samples: Elemental fractionation as the main
           source of errors
    • Authors: Yu. K. Shazzo; Yu. A. Karpov
      Pages: 1069 - 1080
      Abstract: Abstract The review is devoted to one of currently most often used methods for the study of the elemental composition of samples differing by origin and matrix, laser sampling (LS), in combination with inductively coupled plasma mass spectrometry. The method ensures the analysis of samples without their transfer into solution and with high spatial resolution, up to several micrometers. The main restriction of laser sampling is due to elemental and isotopic fractionation, proceeding in the interaction of laser irradiance with the sample surface, on which photoelectronic and thermal processes, resulting in the formation of sample aerosols of different nature, can occur depending on the characteristics of laser irradiance. The paper covers works on the study of the effect of the laser wavelength, pulse duration, pulse fluence, plasma screening, explosive boiling, and the crater geometry on elemental fractionation and works in which fractionation coefficients were calculated on the basis of experimental data.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816110125
      Issue No: Vol. 71, No. 11 (2016)
       
  • Using silica modified by Tiron for metal preconcentration and
           determination in natural waters by inductively coupled plasma atomic
           emission spectrometry
    • Authors: S. L. Didukh; V. N. Losev; A. N. Mukhina; A. K. Trofimchuk
      Pages: 1081 - 1088
      Abstract: Abstract A new adsorbent is synthesized on the basis of silica consecutively modified by polyhexamethylene guanidine and 4,5-dihydroxy-1,3-benzenedisulfonic acid (Tiron) for the group preconcentration of Fe(III), Al(III), Cu(II), Pb(II), Zn(II), and Mn(II) followed by determination by inductively coupled plasma atomic emission spectrometry. The adsorbent in the batch mode quantitatively (recovery 98−99%) extracts Fe(III), Al(III) and Cu(II) ions at pH 4.0 and Fe(III), Al(III), Cu(II), Pb(II), Zn(II), and Mn(II) ions at pH 7.0; the time of attainment of an adsorption equilibrium does not exceed 10 min. Consecutive preconcentration at pH 4.0 and 7.0 in the batch and dynamic modes ensures the quantitative separation of Fe(III), Al(III), and Cu(II) from Pb(II), Zn(II), and Mn(II) and their separate determination. The quantitative desorption of metals was attained with 0.5−1.0 M HNO3 (5 or 10 mL). In preconcentration from 200 mL of solution with 5 mL of a desorbing solution, the preconcentration coefficient was equal to 40. The developed procedure was used for the determination of metal ions in river waters of Krasnoyarsk Krai. The results obtained were verified by the added−found method.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816090082
      Issue No: Vol. 71, No. 11 (2016)
       
  • Determination of boron in organic compounds by microwave
           plasma–atomic emission spectrometry
    • Authors: M. A. Bazhenov; V. D. Tikhova; V. P. Fadeeva
      Pages: 1089 - 1095
      Abstract: Abstract We propose a method for the determination of boron in aliphatic and aromatic trifluoroborates (including perfluorinated ones), ethers, and organoboron compounds containing dioxoborolane fragments, pyridine, and pyrazole rings, and triple bonds. The substances were decomposed by the oxygen flask combustion method. Boron was determined on an Agilent 4100 microwave plasma–atomic emission spectrometer. A number of organic compounds were analyzed, and the mass fraction of boron was determined with an error less than ±0.3 abs. %.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816090033
      Issue No: Vol. 71, No. 11 (2016)
       
  • Application of chemical sensors to the rapid assessment of the digestive
           tract of birds
    • Authors: T. A. Kuchmenko; A. A. Shuba; I. V. Cheremushkina
      Pages: 1096 - 1103
      Abstract: Abstract The application of a piezosensor array to the assessment of the conditions of the digestive tract of birds by the presence and concentrations of dysbiosis markers in the equilibrium gas phase over the biosamples is discussed. A dysbiosis index is proposed for the rapid screening diagnosis of the dysbiosis status of intestines, calculated by the output data of the sensor array. The results obtained with chemical sensors are consistent with the data of microbiological studies. The method is very useful in monitoring the dynamics of variation of the dysbiosis index.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816110071
      Issue No: Vol. 71, No. 11 (2016)
       
  • A semiconductor sensor based on indium antimonide for the potentiometric
           analysis of soils from the Chinarev oil and gas field
    • Authors: V. A. Burakhta; L. I. Baitlesova
      Pages: 1104 - 1108
      Abstract: Abstract The ion−salt composition of soils from the Chinarev oil and gas field (West Kazakhstan Region) was studied. A semiconductor sensor based on indium antimonide (InSb) and classical ion-selective electrodes were used to analyze soil extracts. Comparative results of determinations of pH, HCO3 - Cl–, and SO4 2- in soil samples with a semiconductor InSb-electrode and with glass, chloride-selective, and copper-selective electrodes are presented. The use of a single semiconductor sensor for the determination of four components in a soil extract allowed us to reduce the duration of analysis and to unify the determination. Based on the results obtained, the salt composition of soils from the studied field was estimated.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816090069
      Issue No: Vol. 71, No. 11 (2016)
       
  • Identification of mineral waters using impedance spectroscopy and
           projection to latent structures
    • Authors: A. V. Sidel’nikov; D. I. Dubrovskii; F. Kh. Kudasheva; V. N. Maistrenko
      Pages: 1109 - 1114
      Abstract: Abstract A method is proposed for the rapid identification of mineral waters by impedance spectroscopy combined with chemometric experimental data processing by projection to latent structures. Measurement conditions are optimized and performance characteristics are estimated. Possibilities of the extraction of qualitative and quantitative information on the concentrations of metal ions and anions in water, determination of the nature of mineral waters, degree of mineralization, and conformity to standard samples are shown.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816110137
      Issue No: Vol. 71, No. 11 (2016)
       
  • Determination of lead ions using an diantipyrylmethane-based electrode
    • Authors: S. D. Tataeva; V. S. Magomedova; K. E. Magomedov
      Pages: 1115 - 1119
      Abstract: Abstract The possibility of using diantipyrylmethane as an ionophore component of a lead-selective electrode membrane was assessed. Membrane composition (wt %) was optimized: polyvinyl chloride (31.89), dioctyl sebacate (63.81), diantipyrylmethane (2.50), and oleic acid (1.80). The proposed model of the electrode works in the concentration range of 1 × 10–5–0.1 M with a detection limit of 2 mg/L. A slope of the electrode function of the diantipyrylmethane-based electrode is 29.4 ± 0.5 mV/pPb. Concentration of Pb(II) ions in various samples was determined.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816110149
      Issue No: Vol. 71, No. 11 (2016)
       
  • Determination of a polyhexamethylene guanidine by voltammetry at an
           interface between two immiscible electrolyte solutions
    • Authors: L. Yu. Martynov; A. O. Naumova; N. K. Zaitsev
      Pages: 1120 - 1125
      Abstract: Abstract A possibility of the determination of polyhexamethylene guanidine (PHMG) by voltammetry at an interface between two immiscible electrolyte solutions water–o-nitrophenyl ether is shown. An electrochemical sensor based on a microperforated polymer film is created to implement the method. Factors affecting the formation of the analytical signal were studied, working conditions of voltammetric measurements were selected on their basis. The developed method was applied to the determination of PHMG in antiseptics.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816110095
      Issue No: Vol. 71, No. 11 (2016)
       
  • A combined method of sample preparation for the determination of the total
           element composition of oils
    • Authors: T. A. Maryutina; E. Yu. Savonina; O. N. Katasonova
      Pages: 1126 - 1130
      Abstract: Abstract A comprehensive approach to the determination of the elemental composition of oils (including those with a viscosity of 5000 mm2/s) is proposed. It ensures the determination of the most elements present in oils using two versions of sample preparation, autoclave decomposition of oil samples and extraction preconcentration of elements from oil into an aqueous solution on rotating coiled columns (RCCs). The application of RCCs in the elemental analysis of oil ensures the preconcentration of a number of trace elements from oil (including rare-earth elements) and the determination of their concentrations at a level of ng/kg. The preconcentration factor of trace elements from oil using an RCC depends on the volume of oil sample pumped through a constant volume of the stationary phase (acid solution) retained in the column and on the speciation of elements in the oil.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816110101
      Issue No: Vol. 71, No. 11 (2016)
       
  • Determination of unsaturated fatty acids with a migrating double bond in
           complex biological matrices by gas chromatography with flame ionization
           and mass spectrometry detection
    • Authors: A. N. Ivankin; G. L. Oliferenko; A. V. Kulikovskii; I. M. Chernukha; A. A. Semenova; K. I. Spiridonov; V. V. Nasonova
      Pages: 1131 - 1137
      Abstract: Abstract We present the results of determination of unsaturated fatty acids (FAs) in foods of animal origin. It is shown that, in addition to the main component, monounsaturated cis-9-octadecenoic (oleic) acid, other fatty acids may be present in the composition of lipids, depending on the type of raw materials used to prepare the food product. The determination of these acids can significantly vary depending on the presence of impurities and assay conditions. It is demonstrated that gas chromatographic systems with a flame ionization detector, conventionally used for the determination of the fatty acid composition, are useless for the reliable identification of close structural analogues of unsaturated essential fatty acids. The conditions of determination of these compounds with mass spectrometric detection are selected. The effect of the composition of analytes, which were animal ingredients, on the results is discussed. It is shown that the greatest difficulty is the determination of unsaturated fatty acids present in test samples of different aetiologies in amounts not exceeding 0.05–0.1%.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816110046
      Issue No: Vol. 71, No. 11 (2016)
       
  • Statistical-probability simulation of the organoleptic properties of grape
           wines
    • Authors: A. A. Khalafyan; Yu. F. Yakuba; Z. A. Temerdashev; A. A. Kaunova; V. O. Titarenko
      Pages: 1138 - 1144
      Abstract: Abstract Approaches to the evaluation of generalized wine quality indices based on a set of the quantitative characteristics of single parameters and their organoleptic rating were studied with the use of statistical-probability simulation methods. A general linear model (multiple linear regression) was constructed to predict degustation evaluation values from the concentrations of volatile substances (acetaldehyde, ethyl acetate, methanol, higher alcohols, acetic acid, and furfural) and wine quality classes (high, medium, low, and adulterated). The wine quality class was identified by discriminant analysis based on the concentrations of the above volatile substances. A program module was developed for the automation of a calculation procedure. The average absolute deviation of predicted values from degustation evaluation data in a test sample was 5.8%.
      PubDate: 2016-11-01
      DOI: 10.1134/s106193481611006x
      Issue No: Vol. 71, No. 11 (2016)
       
  • Determination of purple corn husk anthocyanins
    • Authors: V. I. Deineka; A. N. Sidorov; L. A. Deineka
      Pages: 1145 - 1150
      Abstract: Abstract Components of the purple corn husk anthocyanin complex as a rich inedible source for the preparation of natural dyes were analyzed by reversed-phase HPLC with spectrophotometric and mass-spectrometric detection. The wide speciation of anthocyanins was found and its main components were identified as malonylation products of cyanidin-3-glucoside, 3″,5″-dimalonate (31.0%), 5″-monomalonate (32.2%), and 3″-monomalonate (7.3%), with low concentrations of similar pelargonidin and peonidin derivatives. The total accumulation level of anthocyanins in the samples under study exceeded 3.5 g per 100 g of an air-dry material. The results of the study of anthocyanin complexes of other purple corn parts are presented for comparison. Based on the studies performed, supplements to differential spectrophotometric and chromatographic methods for the determination of anthocyanins were proposed, which gave reproducible data for two alternative methods of their determination.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816110034
      Issue No: Vol. 71, No. 11 (2016)
       
  • A gas chromatographic study of the residual contents of a medieval
           sphero-conical vessel
    • Authors: V. M. Pozhidaev; A. V. Kamaev; E. G. Devlet; E. A. Greshnikov; A. R. Nuretdinova; M. V. Sivitskii
      Pages: 1151 - 1153
      Abstract: Abstract Black deposit was discovered on the inner wall of a sphero-conical vessel found during archaeological excavations on the territory of the Volga Bulgars. Compounds from the deposit were extracted with organic solvents and studied by gas chromatography with flame ionization and mass spectrometry detectors. Abietic acid derivatives, including retene, present in the composition of soft wood turpentine were identified. The relatively high retene concentration in the remains of the spherocone and also the presence of other polycyclic aromatic hydrocarbons suggest the thermal version of their origin. Probably, the vessel was used as a part of alambik, which is an ancient distillation apparatus for the distillation of soft wood turpentine.
      PubDate: 2016-11-01
      DOI: 10.1134/s1061934816110113
      Issue No: Vol. 71, No. 11 (2016)
       
  • On the methodology of creation of novel techniques for quantitative
           chemical analysis
    • Authors: Yu. A. Zolotov
      Pages: 1014 - 1015
      Abstract: Abstract Sources of new analytical techniques, mainly quantitative, are considered. The birth of novel techniques of quantitative analysis is usually associated with the finding and use of characteristics (properties) of an object, specifically related to the component concentration. The success of such a search substantially depends on the possibility of monitoring advances in many branches of science and instrumentation and of their assessment from the viewpoint of suitability and prospects for analysis.
      PubDate: 2016-10-01
      DOI: 10.1134/s1061934816100129
      Issue No: Vol. 71, No. 10 (2016)
       
  • Determination of aliphatic acids in natural waters using distillation and
           solid-phase extraction
    • Authors: V. V. Khasanov; A. I. Makarycheva; Yu. G. Slizhov
      Pages: 1028 - 1032
      Abstract: Abstract A procedure is developed and conditions are optimized for the pretreatment of natural water using distillation with no prefiltration of acidified water in combination with preconcentration by solid-phase extraction (SPE) on a Strata-X polymeric adsorbent followed by derivatization for the determination of trace concentrations of C3–C18 aliphatic carboxylic acids by gas chromatography with mass spectrometric detection. It is shown that, at the distillation stage, 90% of free carboxylic acids of the homologous series are transferred to the distillate, which greatly facilitates the procedure of the analysis of natural water containing impurity particles and humic substances and ensures the achievement of the limit of detection for the analytes about 0.05 μg/L. It is found that, at the SPE stage, the adsorbents based on copolymers of styrene, divinylbenzene, and N-vinylpyrrolidone in plastic cartridges may serve as sources of additional pollution with benzoic, palmitic, and stearic acids in the eluates under investigation.
      PubDate: 2016-10-01
      DOI: 10.1134/s1061934816100051
      Issue No: Vol. 71, No. 10 (2016)
       
  • Simultaneous determination of aliphatic acids and aldehydes in aqueous
           media by reaction gas chromatography
    • Authors: M. G. Pervova; D. L. Chizhov; V. I. Saloutin
      Pages: 1041 - 1045
      Abstract: Abstract A procedure is developed for the gas chromatographic determination of lower aldehydes as dibutoxyalkanes and carboxylic acids as butyl esters by the reaction with tributyl borate in an aqueous medium. Derivatization conditions were optimized. The procedure was used to determine side products in glyoxal synthesized by the catalytic oxidation of ethylene glycol.
      PubDate: 2016-10-01
      DOI: 10.1134/s1061934816100099
      Issue No: Vol. 71, No. 10 (2016)
       
  • Influence of modifying cobalt(II) chloride additive on the selectivity of
           stationary phases in gas chromatography
    • Authors: O. V. Rodinkov; G. A. Zhuravleva; L. N. Moskvin
      Pages: 1046 - 1051
      Abstract: Abstract Effect of a modifying cobalt(II) chloride additive on the selectivity of adsorbents and liquid stationary phases used in gas chromatography for the separation of volatile organic substances (VOSs) of different chemical nature is considered. It is found that the specified additive leads to a drastic increase in the retention parameters of oxygen-containing VOSs, first of all, aliphatic alcohols, and relatively weakly affects the retention of other VOSs, including nucleophilic nitrogen-containing compounds. In particular, the addition of cobalt chloride to Carbowax increases the retention parameters of methanol and ethanol and reduces the corresponding parameters for analytes from the other VOS classes.
      PubDate: 2016-10-01
      DOI: 10.1134/s1061934816100105
      Issue No: Vol. 71, No. 10 (2016)
       
  • Determination of growth hormones (β-agonists) in muscle tissue by HPLC
           with mass spectrometric detection
    • Authors: A. V. Kulikovskii; A. B. Lisitsyn; I. F. Gorlov; M. I. Slozhenkina; S. A. Savchuk
      Pages: 1052 - 1056
      Abstract: Abstract A procedure is developed for determining 11 β-agonists, that is, hormonal growth promoters for farm animals, using HPLC with mass spectrometric detection. The procedure includes the enzymatic hydrolysis of homogenates of organs and tissues of animals (longissimus muscle, liver, and kidney), precipitation of proteins with perchloric acid, extraction of β-agonists with a mixture of isopropyl alcohol–ethyl acetate (6: 4), purification of the extract by solid phase extraction using a Bond Elut cartridge, HPLC separation in the gradient elution mode, electrospray ionization, and mass spectrometric detection in the multiple reaction monitoring mode. The procedure is certified. The analytical range is 1.0–100.0 μg/kg.
      PubDate: 2016-10-01
      DOI: 10.1134/s1061934816100075
      Issue No: Vol. 71, No. 10 (2016)
       
  • Electrochemical determination of riboflavin using a synthesized
           ethyl[(methythio)carbonothioyl] glycinate monolayer modified gold
           electrode
    • Authors: F. Karimian; G. H. Rounaghi; M. Mohadeszadeh
      Pages: 1057 - 1062
      Abstract: Abstract The surface of a gold disk electrode, for the first time, was modified with a self-assembled monolayer of a synthesized compound, ethyl [(methythio)carbonothioyl] glycinate (ECTG), for construction of an electrode sensitive to riboflavin (vitamin B2). The electrochemical properties of the monolayer assembled on the gold disk were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Under the optimized conditions, the voltammetric peak currents resulting from vitamin B2 (VB2) species were linear for VB2 concentrations in the range from 10–6 to 10–2 M. The effect of pH, type of buffer solution and scan rate on the response of the modified electrode was studied. The constructed electrochemical sensor responses very well to VB2 in the presence of most common vitamins. Finally, the performance of the Au–ECTG modified electrode was successfully tested for electrochemical detection of VB2 in a pharmaceutical sample.
      PubDate: 2016-10-01
      DOI: 10.1134/s1061934816080062
      Issue No: Vol. 71, No. 10 (2016)
       
  • Development of a toolkit for early precision immunochromatographic
           diagnosis
    • Authors: D. V. Krylsky; A. P. Gushchin; S. A. Gushchin; S. V. Dezhurov; O. S. Morenkov; P. P. Gladyshev; A. A. Vasiliev
      Pages: 1063 - 1068
      Abstract: Abstract A device is developed for automated immunochromatographic assay, designed for one-time tests at the place of occurrence of a disease. The device comprises a turntable platform for up to five strips placed simultaneously, a unit for sample collection and microdosing to a test strip, a detection unit, and a microprocessor control system. A manual, semiautomatic, or automatic operation mode may be selected. Colloidal quantum dots with a luminescence peak from the visible to near-infrared spectral region (600–800 nm) are used as fluorescent labels. A UV-LED or a laser at 365–480 nm can be used as an excitation system; the detection device is a spectrometer with an operation range of 500–800 nm, based on a CCD series of TCD1304DG sensors (Toshiba). RFID tags of samples can re read and the analysis results can be sent to an external computer. The device is made in a plastic case for carrying.
      PubDate: 2016-10-01
      DOI: 10.1134/s1061934816100063
      Issue No: Vol. 71, No. 10 (2016)
       
 
 
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